26dkou113
10.3205/26dkou113
urn:nbn:de:0183-26dkou1134
Meeting Abstract
Simulated full weight bearing following anterior column and posterior hemi-transverse acetabular fracture fixation: A biomechanical comparability study
Bolierakis
Bolierakis
Eftychios
E
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Praster
Praster
Maximilian
M
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Lambertz
Lambertz
Lukas
L
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Alabdulrahman
Alabdulrahman
Hatem
H
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Groven
Groven
Rald
R
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Hofmann
Hofmann
Ulf Krister
UK
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Hildebrand
Hildebrand
Frank
F
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
Berk
Berk
Till
T
Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Uniklinik RWTH Aachen, Aachen, Deutschland
author
German Medical Science GMS Publishing House
Düsseldorf
610
20261020
engl
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung).
M0659
113
Deutsche Gesellschaft für Orthopädie und Unfallchirurgie
Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie
Deutsche Gesellschaft für Unfallchirurgie
Berufsverband für Orthopädie und Unfallchirurgie
Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2026)
Abstracts | Optimierte Ergebnisse nach Endoprothetik
Berlin
20261020
20261023
DKOU26_Abs_2370
TextObjectives and questions: The management of displaced acetabular fractures in elderly patients remains a significant clinical challenge. The optimal surgical strategy, either open reduction and internal fixation or total hip arthroplasty, continues to be a matter of debate. Furthermore, postoperative weight-bearing protocols for both treatment modalities lack clear consensus. The aim of this biomechanical study was to evaluate construct stiffness as well as the magnitude of translation and angulation under load following fixation of an anterior column and posterior hemi-transverse (ACPHT) acetabular fracture. Two treatment strategies were compared: standard plate osteosynthesis using a 3.5-mm reconstruction plate (DePuy Synthes) and total hip arthroplasty using a cementless modular revision cup with an iliac peg (MRS-Titan® maximum, Peter Brehm GmbH). All constructs were tested under full weight-bearing conditions.Material and methods: Six composite osteoporotic pelvis models were used in this study. An ACPHT acetabular fracture, according to the Judet and Letournel classification, was created in 12 hemi-pelvic constructs. Specimens were stratified into two groups (n = 6 per group) as follows: (i) fixation of the ACPHT acetabular fracture using standard plate osteosynthesis (ORIF); and (ii) treatment of the ACPHT acetabular fracture using a cementless modular revision cup with an iliac peg (THA). All specimens underwent biomechanical testing under progressively increasing cyclic loading until failure. Interfragmentary movements were continuously monitored using a motion-tracking system.Results: Median initial construct stiffness (N/mm)was 165.02 (IQR=9.81)for ORIF and 105.95 (IQR=80.81) for THA. Median relative translation under maximal load was comparable between groups (16,66 mm for ORIF vs. 16.30 mm for THA). THA demonstrated lower median relative rotation under maximal load (3.87° for ORIF vs. 2.78° for THA).Discussion and conclusions: Treatment of ACPHT acetabular fractures with eitherplate osteosynthesis or usinga cementless modular revision cup with iliac pegdemonstrated encouraging results for application ofa post-surgical treatment concept with a full weight bearing approach. Further biomechanical cadavericstudies with larger sample sizeshould be initiatedfor a better understanding of acetabular fracture treatment with full weight bearing and its potential as a concept for ACPHT acetabular fracture fixation.
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